A patient with Myocardial Infarction is receiving IV NTG which of the following should be assessed frequently?

WCL Staff Nurse - 2019

Medical & Surgical Nursing

Medium

Appeared in: WCL Staff Nurse - 2019

Explanation

IV Nitroglycerin (NTG) is a potent vasodilator used in Myocardial Infarction to reduce cardiac workload and improve coronary blood flow.
Its primary mechanism involves dilating both veins (reducing preload) and arteries (reducing afterload), which leads to a decrease in blood pressure.
This effect can be rapid and profound, causing significant hypotension, which can worsen myocardial ischemia and lead to syncope or shock.
Therefore, frequent and close monitoring of blood pressure is the most critical nursing assessment to ensure patient safety and titrate the dose effectively.

Option B: NTG does not have a direct effect on blood glucose levels. This assessment is not related to the drug's primary mechanism or immediate side effects.
Option C: Assessing breath sounds is for detecting heart failure complications (pulmonary edema), not for monitoring the direct, immediate effects of NTG.
Option D: Urine output is a secondary indicator of perfusion. Changes in blood pressure occur much more rapidly and are the primary variable to monitor to prevent renal hypoperfusion.

Clinical Relevance

Nursing practice connection: Use the key finding related to Priority nursing assessment for a patient on IV Nitroglycerin (NTG) to guide bedside assessment, documentation, and the next nursing action.
Nurses are responsible for titrating the IV NTG infusion rate based on the patient's chest pain relief and blood pressure response, adhering to strict institutional protocols.
Patient safety is paramount. Preventing severe hypotension avoids complications like falls from dizziness, syncope, and worsened cardiac ischemia due to poor coronary perfusion pressure.
What if? If the patient's systolic blood pressure drops to 85 mmHg, the nurse's immediate priority is to decrease or stop the NTG infusion according to protocol, notify the provider, and prepare to administer fluids if ordered. The primary goal shifts from pain relief to restoring hemodynamic stability.

How to Approach the Question

First, identify the core of the question: what is the most important frequent assessment for a patient on IV NTG?
Recall the drug class and primary mechanism of action of Nitroglycerin: it is a potent vasodilator.
Connect the mechanism (vasodilation) to its most direct and potentially dangerous physiological effect: a decrease in blood pressure (hypotension).
Evaluate the options based on this primary effect. Blood pressure is a direct consequence. Blood glucose is unrelated. Breath sounds and urine output are related to MI complications or are secondary effects of severe hypotension, not the primary, immediate effect of the drug itself.
Conclude that monitoring the most direct and dangerous effect (hypotension via blood pressure) is the highest priority and requires the most frequent assessment.

Concept Tested & Keywords

Concept Tested: Priority nursing assessment for a patient on IV Nitroglycerin (NTG).
Stem keywords: Myocardial Infarction, IV NTG, assessed frequently
Lead-in keywords: frequently

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